近心阻生大臼齒之簡易扶正法第一部份：下顎第二大臼齒之扶正

An Easy Way to Upright Mesially Impacted Molars Part One: Mandibular Second Molar Uprighting

陳仁杰(Ren-Jye Chen)

《中華民國齒顎矯正學雜誌》 16卷2期 (2004/06) Pp. 5-15

https://doi.org/10.30036/TJO.200406.0002

摘要

以往，扶正近心阻生下顎第二大臼齒的方法，都將扶正裝置放在下顎第一大臼齒，使得第一、二大臼齒間的托架間距縮短，矯正醫師因而必須用一些較繁複的方法去因應。本報告提出的方法不再依靠下顎第一大臼齒，而是將套在0.018鎳鈦合金弓線之彈開簧圈放在下顎第二大、小臼齒間，來扶正近心阻生下顎第二大臼齒。本方法簡單、容易，單、雙側病例均適用：也可應用於扶正其他近心阻生大臼齒。十二年來，作者以本法為31位患者，成功的扶正43顆近心阻生大臼齒。本系列報告第一部份，探討近心阻生下顎第二大臼齒之成因與扶正方法，並擇其中5例簡要報告。

關鍵字

阻生大臼齒 ； 大臼齒扶正法

並列摘要

In the past, orthodontic appliances were most often put on the mandibular first molar to upright the mesially impacted mandibular second molar. With this setup, the interbracket distance between the first and second molars would be decreased remarkably. Decreased interbracket distance and limited working space in the molar area force clinicians to make the uprighting appliances with arduous wire bending and/or time consuming laboratory procedures. In this report, a piece of open coil, carried by a 0.018 nickel titanium archwire, was engaged, bypassing the first molar, between the second premolar and the mesially impacted second molar, to upright the latter. The technique is a simple, easy, and effective treatment for both unilateral and bilateral cases, and can be applied to correct the mesial impaction of other molars.

並列關鍵字

Impacted molar ； molar uprighting